Volume 55 (2023)
Volume 54 (2022)
Volume 53 (2021)
Volume 52 (2020)
Volume 51 (2019)
Volume 50 (2018)
Volume 49 (2017)
Volume 48 (2016)
Volume 47 (2016)
Volume 46 (2015)
Volume 45 (2014)
Volume 44 (2013)
Volume 43 (2009)
Volume 42 (2008)
Volume 41 (2007)

بررسی رفتار لرزه‌ای اتصال خمشی پیچی با صفحه انتهایی بلند

Mehdi Ghassemieh; Mehdi Jalalpour

Volume 41, Issue 1 , March 2007, , Pages 103-116


  Today connections are playing an important role in the steel frames subjected to lateral seismic loading. The steel extended end-plate moment connection can play an important role in the steel frame when subjected to seismic loadings. In the past, this type of connection has been under investigation ...  Read More

The edge tenacity of a split graph

Bahareh Bafandeh Mayvan

Volume 47, Issue 1 , June 2016, , Pages 119-125


  The edge tenacity Te(G) of a graph G is de ned as:Te(G) = min {[|X|+τ(G-X)]/[ω(G-X)-1]|X ⊆ E(G) and ω(G-X) > 1} where the minimum is taken over every edge-cutset X that separates G into ω(G - X) components, and by τ(G - X) we denote the order of a ...  Read More

Tenacious Graph is NP-hard

Dara Moazzami

Volume 51, Issue 2 , December 2019, , Pages 127-134


  The tenacity of a graph $G$, $T(G)$, is defined by$T(G) = min\{\frac{\mid S\mid +\tau(G-S)}{\omega(G-S)}\}$, where theminimum is taken over all vertex cutsets $S$ of $G$. We define$\tau(G - S)$ to be the number of the vertices in the largestcomponent of the graph $G-S$, and $\omega(G-S)$ be the number ...  Read More

Group $\{1, -1, i, -i\}$ Cordial Labeling of sum of $C_n$ and $K_m$ for some $m$

M.K.Karthik Chidambaram; S. Athisayanathan; R. Ponraj

Volume 49, Issue 2 , December 2017, , Pages 129-139


  Let G be a (p,q) graph and A be a group. We denote the order of an element $a \in A $ by $o(a).$  Let $ f:V(G)\rightarrow A$ be a function. For each edge $uv$ assign the label 1 if $(o(f(u)),o(f(v)))=1 $or $0$ otherwise. $f$ is called a group A Cordial labeling if $|v_f(a)-v_f(b)| \leq 1$ and $|e_f(0)- ...  Read More

Detour Monophonic Graphoidal Covering Number of Corona Product Graph of Some Standard Graphs with the Wheel

P. Titus; S. Santha Kumari

Volume 51, Issue 1 , June 2019, , Pages 129-145


  A chord of a path $P$ is an edge joining two non-adjacent vertices of $P$. A path  $P$ is called a monophonic path if it is a chordless path. A longest $x-y$ monophonic path is called an $x-y$ detour monophonic path. A  detour monophonic graphoidal cover of a graph $G$ is a collection $\psi_{dm}$ ...  Read More

Towards a measure of vulnerability, tenacity of a Graph

Dara Moazzami

Volume 48, Issue 1 , December 2016, , Pages 149-153


  If we think of the graph as modeling a network, the vulnerability measure the resistance of the network to disruption of operation after the failure of certain stations or communication links. Many graph theoretical parameters have been used to describe the vulnerability of communication networks, including ...  Read More

Solving a non-linear optimization problem in the presence of Yager-FRE constraints

A. Ghodousian; Abolfazl Javan; Asieh Khoshnood

Volume 50, Issue 1 , June 2018, , Pages 155-183


  Yager family of t-norms is a parametric family of continuous nilpotent t-norms which is also one of the most frequently applied one. This family of t-norms is strictly increasing in its parameter and covers the whole spectrum of t-norms when the parameter is changed from zero to infinity. In this paper, ...  Read More

استفاده از رگولاریزاسیون خطی برای پیش‌بینی توابع توزیع دارای چند پیک در جاذبهای ناهمگن

Ali Haghighi Asl; Akbar Shahsavand; Mohammad Reza Ghorbani

Volume 41, Issue 2 , July 2007, , Pages 167-177


  In the present article an energy distribution function of heterogeneous solid was estimated. Energy distribution function is an important characterization for heterogeneous adsorbent. An overall adsorption quantity for a heterogeneous solid is usually expressed by a first kind of Fredholm equation, which ...  Read More

ررسی اثر مخلوط مواد فعال سطحی روی پدیده پیوند قطره

Mirhamed Mousavi; Parisa Khadivparsi; Seyyed Mohammad Ali Mousavian

Volume 42, Issue 2 , May 2008, , Pages 204-218


  In this research, effect of bicomponent mixed surfactant was studied on drop interface coalescence phenomenon in ambient temperature. First basic chemical system was water and toluene and 0.01 gr of sodium dodecyle sulfate (SDS) and the second basic system was water and toluene and 0.01 gr of cethyl ...  Read More

تحلیل حرکت جریانات دریائی در تصاویر حرارتی سطح آب دریا

Mehdi Hassanlou; Mohammad Reza Serajian

Volume 43, Issue 4 , September 2009, , Pages 379-389


  Oceanographic images obtained from environmental satellites by a wide range of sensors allow characterizing natural phenomena through different physical measurements. For instance Sea Surface Temperature (SST) images, altimetry data and ocean color data can be used for characterizing currents and vortex ...  Read More

مقایسه ضریب موضعی انتقال حرارت جابجایی آزاد از استوانه‌های افقی در ردیف‌های عمودی و مایل

Mehdi Ashja'ee; Touraj Yousefi; Hossein Shokouhmand

Volume 41, Issue 4 , November 2007, , Pages 391-399


  An experimental and numerical study of free convection heat transfer from a channel consisting of a vertical sinusoidal wavy surface and a vertical flat plate has been carried out. The vertical wavy surface was maintained at a constant temperature, while the flat plate is adiabatic. A Mach-Zehnder Interferometer ...  Read More

روابط جدید زمان چرخه بهینه برای تقاطع‌های پیش‌زمان‌بندی شده مستقل با تغییر رابطه وبستر براساس روش HCM 2000

Ali Babaee Zadeh; Hashem Mehrazin

Volume 42, Issue 4 , August 2008, , Pages 419-429


  When the degree of saturation at intersection approaches one, Webster’s optimum cycle length equation becomes inapplicable, because the cycle length will becomes very big when the degree of saturation approaches one and will be fully unrealistic when the degree of saturation becomes greater than one. ...  Read More

تحلیل و طراحی تغییر دهنده فاز N - بیتی MEMS توزیع شده در باند Ka

Habibollah Zolfkhani; Jalil Rashed Mohassel; Farrokh Hojjat Kashani

Volume 41, Issue 5 , December 2007, , Pages 623-630


  Modern microwave and millimeter wave phased array antennas are attractive because of their ability to steer wave beams in space without physically moving the antenna element. A typical phased array antenna may have several thousand elements fed by a phase shifter for every antenna, which can steer the ...  Read More

ررسی خواص سوپر الاستیسیته سیم ارتودنسی NiTi با استفاده از خمش سه نقطه‌ای به کمک مدل شبیه سازی شده با دهان

Maryam Haj Fath'alian; Mahmoud Nili Ahmadabadi; Mohammad Habibi Parsa; Tahereh Shah Hosseini; Hannaneh Ghadirian; Tahereh Hosseinzadeh Nik

Volume 42, Issue 5 , September 2008, , Pages 631-637


  Equi-atomic Nickel-Titanium (NiTi or Nitinol) has the ability to return to a former shape when subjected to an appropriate thermo-mechanical regime. Pseudoelastic and shape memory effects are some of the behaviors presented by these alloys. The unique properties concerning these alloys have encouraged ...  Read More

بازتاب و شکست موج SH در مرز ناهموار بین دو محیط ایزوتروپ جانبی

Navid Shad Manaman; Morteza Eskandari Ghadi

Volume 42, Issue 6 , December 2008, , Pages 751-763


  The existing theory for wave propagation through a soil layer are not compatible with the real soil layers because in the theory the layers are flat and the sub-layers are parallel, while in real the soil layers are not flat and they may not be parallel. Thus, wave propagations through a corrugated interface ...  Read More

توابع احتمالی حاکم بر نیروها و لنگرهای ناشی از امواج تصادفی دریا بر پایه قائم

Mohammad Ali Lotfollah Yaghin; Ali Reza Mojtahedi

Volume 41, Issue 6 , January 2008, , Pages 797-807


  Using the statistical characteristics is one of the methods to justify the random nature of the ocean waves. Probability function are used to facilitate the studies of the random waves parameters, such as the surface and height and period of the waves. Since, the force of the ocean waves are the prevalent ...  Read More

پیش‌بینی جریان و انتقال حرارت در کانال‌های ریب‌دار سه بعدی توسط مدل‌های ?-K خطی و غیرخطی

Hooman Naimi; Mehrdad Raisee

Volume 43, Issue 1 , April 2009, , Pages 125-138


  The present paper deals with the prediction of three-dimensional fluid flow and heat transfer in rib-roughened ducts of square cross-section. Such flows are of direct relevance to the internal cooling system of modern gas turbine blades. The main objective is to assess how a recently developed variant ...  Read More

Minimum Tenacity of Toroidal graphs

Hamid Doost Hosseini

Volume 47, Issue 1 , June 2016, , Pages 127-135


  The tenacity of a graph G, T(G), is de ned by T(G) = min{[|S|+τ(G-S)]/[ω(G-S)]}, where the minimum is taken over all vertex cutsets S of G. We de ne τ(G - S) to be the number of the vertices in the largest component of the graph G - S, and ω(G - S) be the number of components of G ...  Read More

Exergy Optimization Applied to Linear Parabolic

Ahmad Kahrobaian; Hamid Reza Malekmohammadi

Volume 42, Issue 1 , April 2008, , Pages 131-144


  A new method of optimization on linear parabolic solar collectors using exergy analysis is presented. A comprehensive mathematical modeling of thermal and optical performance is simulated and geometrical and thermodynamic parameters were assumed as optimization variables. By applying a derived expression ...  Read More

A Review of Replica Replacement Techniques in Grid Computing and Cloud Computing

Najme Mansouri; Mohammad Masoud Javidi

Volume 51, Issue 2 , December 2019, , Pages 134-151


  A data-intensive computing platform, encountered in some grid and cloud computing applications, includes numerous tasks that process, transfer or analysis large data files. In such environments, there are large and geographically distributed users that need these huge data. Data management is one of ...  Read More

Normalized Tenacity and Normalized Toughness of Graphs

A. Javan; M. Jafarpour; D. Moazzami; A. Moieni

Volume 49, Issue 2 , December 2017, , Pages 141-159


  In this paper, we introduce the novel parameters indicating Normalized Tenacity ($T_N$) and Normalized Toughness ($t_N$) by a modification on existing Tenacity and Toughness parameters.  Using these new parameters enables the graphs with different orders be comparable with each other regarding their ...  Read More

A Survey On the Vulnerability Parameters of Networks

Mahmood Shabankhah

Volume 48, Issue 1 , December 2016, , Pages 155-162


  The analysis of vulnerability in networks generally involves some questions about how the underlying graph is connected. One is naturally interested in studying the types of disruption in the network that maybe caused by failures of certain links or nodes. In terms of a graph, the concept of connectedness ...  Read More